Effect of SiC particle content on the mechanical behavior and deformation mechanism of SiCp/Al composite under high-frequency dynamic loading

Yang，Zhengji1,2,3; Li，Zhen1,2,3; Zhang，Liangchi1,2,3

2024-06-01

10.1016/j.msea.2024.146643

Materials Science and Engineering: A   影响因子和分区

0921-5093

SiC/Al composites exhibit excellent structural properties but suffer from inherent brittleness, which has brought rigorous challenges on the materials processing. Ultrasonic-vibration-assisted approach offers a promising solution to improve the processability. However, the underlying mechanisms of mechanical response and defect suppression under ultrasonic action have been rarely studied for SiCp/Al composites, hindering the development of high-efficiency processing. This work aims to investigate the mechanical behavior and microstructural evolution in this class of composites with varying SiC volume fractions up to 45% under high-frequency dynamic load induced by ultrasonic vibration. The results showed that the deformation stress of SiC/Al composites under ultrasonic compression was significantly reduced to only about 1/10 of that under conventional quasi-static loading. Moreover, as the SiC fractions increasing, this ultrasonic softening effect of SiC/Al became more pronounced. The plastic limit of SiC/Al with 45% SiC fraction nearly doubled under ultrasonic compression without any macroscopic cracks. The subsequent nanoindentation tests revealed a transition in work-hardening behavior of SiC/Al with different SiC fractions under ultrasonic loading. Microstructure characterization was conducted to analyze the grain refinement, recrystallization, and deformation textures within the deformed areas, revealing the deformation mechanism of SiC/Al under different loading mode. TEM observations confirmed the distribution of dislocations in Al matrix and dense stacking faults in SiC particles after ultrasonic compression, indicating that the plastic behaviors were enhanced in both Al matrix and SiC phase under the high-frequency cyclic stress. This research revealed the distinct deformation mechanisms of SiC/Al composites under high-frequency dynamic loading, exhibiting extremely low deformation stress accompanied with significantly enhanced plasticity. The results provide theoretical insights for the high-efficiency processing and rapid property regulation of particle-reinforced-composites based on ultrasonic-vibration-assisted technologies.

Deformation mechanism Mechanical behavior Microstructural evolution SiCp/Al composites Ultrasonic loading

SCI ; EI

英语

通讯

MATERIALS SCIENCE

2-s2.0-85193423775

Scopus

1.Shenzhen Key Laboratory of Cross-scale Manufacturing Mechanics,China
2.SUSTech Institute for Manufacturing Innovation,China
3.Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China

Yang，Zhengji,Li，Zhen,Zhang，Liangchi. Effect of SiC particle content on the mechanical behavior and deformation mechanism of SiCp/Al composite under high-frequency dynamic loading[J]. Materials Science and Engineering: A,2024,903.

Yang，Zhengji,Li，Zhen,&Zhang，Liangchi.(2024).Effect of SiC particle content on the mechanical behavior and deformation mechanism of SiCp/Al composite under high-frequency dynamic loading.Materials Science and Engineering: A,903.

Yang，Zhengji,et al."Effect of SiC particle content on the mechanical behavior and deformation mechanism of SiCp/Al composite under high-frequency dynamic loading".Materials Science and Engineering: A 903(2024).